A winery has a vat with two pipes leading to it. The inlet pipe can fill the vat in 4 hours, while the outlet pipe can empty it in 9 hours. How long will it take to fill the vat of both pipes are left open? (Explain work if at all possible.)

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42

Apackage of orgainc strwberries costs $1.50 while there in season and $2.25 when not in season what the percent increase